Drawing mechanisms for spinning machines



E. DAUSCH DRAWING MECHANISMS FOR SPINNING MACHINES Filed April 4. 1955.July 5, 1960 3 Sheets-Sheet l July 5, 1960 E. DAUSCH DRAWING MECHANISMSFOR SPINNING-MACHINES Filed April 4, 1955 3 Sheets-Sheet 2 n m m I n n vInt anion E. Y W i Bow '5 r.

y 1960 E. DAuscH 2,943,363

' DRAWING MECHANISMS FOR SPINNING MACHINES Filed April 4, 1955 3Sheets-Sheet 3 9/ Wm. .90 w I #79. 12 rm/6mm v United States DRAWINGMECHANISMS FOR SPINNING MACHINES.

The present invention relates to drawing mechanisms for spinningmachines.

More particularly, the present invention relates to structure whichreleasably maintains the top rolls carrying arm of a drawing mechanismin its operative position.

Drawing mechanisms for spinning machines are provided with catchmechanisms for releasably holding the top rolls carrying arms in theiroperating position, but the conventional catch mechanisms are not easilyaccessible and, furthermore, require the operator to use both of hishands in order to release the top rol-ls carrying arm so that it may beraised to its inoperative position. Furthermore, with the conventionalcatch mechanisms there is excessive wear of the catch members so that ina relatively short time they are incapable of securely maintaining thetop rolls carrying arm in its operative position, and as a resultreadjustment of the parts is necessary, such readjustment beingdifiicult to carry out and requiring a considerable amount of time.

One of the objects of the present invention is to overcome the abovedrawbacks by providing a drawing mechanism with a releasable catchstructure to hold the top rolls carrying arm in its operative position,this catch structure being capable of being released with one hand ofthe operator.

Another object of the present invention is to provide an arrangementwhich requires the operator to exert a pressure which is a smallfraction of that which maintains the catch structure in its operativeposition, when the operator Wishes to release the catch in order to movethe top rolls carrying arm to its inoperative position.

A further object of the present invention is to provide a catchstructure which will not wear excessively so that it may be used for along period of time without any readjustments.

An additional object of the present invention is to provide a catch andrelease structure of the above type wherein one spring is capable ofreturning the catch to its operative position, and of returning thecatch operating structure to its rest position.

Still another object of the present invention is to provide a releasablecatch structure of the above type which may be used with a drawingmechanism which is conventional except for the catch structure so thatconventional drawing mechanisms need be modified to a very small extent,if at all, in order to accommodate the releasable catch structure of theinvention.

Also, it is an object of the present invention to provide a structurecapable of accomplishing all of the above objects and, at the same time,composed of simple and mggedly constructed elements capable of operatingreliably for a long period of time without any maintenance.

With the above objects in view, the present invention mainly consists ofa drawing mechanism of a spinning machine, and this drawing mechanismincludes an elongated member adapted to carry the top rolls of thedrawing mechanism. A support member is connected to the elongated memberto support the same for movement to atent and from an operatingposition. A first catch part is car ried by the elongated member, and asecond catch part is carried by the support member and engages andcooperates with the first catch part when the elongated member is in itsoperating position to maintain this elongated mem-.

her in its operative position. A manually operative release means iscarried by the elongated member or the support member, and isoperatively connected to either one of the first and second catch partsto move this one of the catch parts out of engagement with the other ofthe tic for the invention are set forth in particular in the ap-,

pended claims. The invention itself, however, both as to itsconstruction and its method of operation, together with additionalobjects and advantages thereof, will be best understood from thefollowing description of specific embodiments when read in connectionwith the accompanying drawings, in which:

Fig. 1 is a fragmentary, partly sectional, side elevational view showinga drawing mechanism having one embodiment of a catch means of theinvention connected thereto;

Fig. 2 is a fragmentary side elevational, partly sectional, view on anenlarged scale of the top rolls carrying arm of Fig. 1 and part of thesupport structure therefor, Fig. 2 showing the details of the catchstructure of Fig. 1;

Fig. 3 is a partly broken away sectional view taken along the lines 3-3of Fig. 2 in the direction of the arrows;

Fig. 4 is a fragmentary sectional view taken along line 4-4 of Fig. 2 inthe direction of the arrows;

Fig. 5 is a fragmentary, partly sectional side elevationa view of a toprolls carrying arm and part of a support therefor, Fig. 5 showinganother embodiment of a catch structure of the invention;

Fig. 6 is a fragmentary sectional view taken along the line 6-6 of Fig.5 in the direction of the arrows;

Fig. 7 is a fragmentary side elevational view of a top rolls carryingarm provided with a third embodiment of a catch structure of theinvention;

Fig. 8 is a fragmentary, partly sectional, side elevational view of afourth embodiment of a catch structure incorporating features of thepresent invention;

Fig. 9 is a sectional fragmentary view taken along the line 9-9 of Fig.8 in the direction of the arrows;

Fig. 10 is a partly sectional fragmentary side elevational view of stillanother embodiment of a catch structure of the invention, this catchstructure being located at the forward end of the drawing plane;

Fig. 11 is a fragmentary end view of the structure of Fig. 10 as seenfrom the left hand thereof, as viewed in Fig. 10;

Fig. 12 is a fragmentary sectional view taken along the line 12-12 ofFig. 10 in the direction of the arrows;

Fig. 13 is a fragmentary sectional view of still another embodiment of acatch structure of the invention, the section of Fig. 13 being takenalong the line 13-13 of Fig. 14 in the direction of the arrows; and

Fig. 14 is a sectional side View of the structure of Fig. 13, thesection of Fig. 14 being taken along the line 14-14 of Fig. 13 in thedirection of the arrows.

Referring now to the drawings, Fig. 1 shows a conventional supportingframe A which supports a drawing mechanism. This supporting frame A hasa rod 10 fixed thereto, and an additional support B is clamped to therod 10 by any suitable means such as the screw 10a. The support B isformed of fairly rigid sheet metal and is substantially U-shaped, thissupport B having a pair Patented July 5, 1960.

of side walls which extend upwardly from the rod 10 and which are formedwith a pair of aligned openings through which the rod 10 extends. Thebottom wall of support B which extends between the side walls thereofis. formed with a slot extending along the entire length of this bottomwall and extending upwardly along the side walls. into communicationwith the openings through which the rod 10 passes, so that the support Bis provided with a pair of lower free portions which may be. drawntogether by the screw 10a so that the support B is clamped on the rod;10. is. apparent particularly from Fig. 3, the support 13 is provided atits lower front an rear po o s th. r ns er e w ll hr u h i h Screw p shi c e 04 be n n fo m of a bolt and nut.

e i e l s of he S pp B. carry a j cen their top ends a pin 11 whichextends between the side walls. As apparent particularly from- Fig, 2,each of the side walls of the support B is provided adjacent its top endwith a forwardly extending projection 21 which forms a stationary catchmember of the invention.

A top rolls carrying arm, C is. turnably carried by the pin 11 formovement between the operating position illustrated in Fig. l and aninoperative position where the arm C is raised upwardly from theposition shown in Fig. 1 The top rolls carrying arm C carries. the toprolls,12 in a purely conventional manner such as by means of the arms 15which are pivotally connected to the top rolls carrying arm C and whichare in turn fixed to the saddle members 13 respectively, whichrespectively bear against the top surfaces of the intermediate shaftportions of the top rolls. Leaf spring members 14 are respectively fixedto the saddle members 13 and engage these intermediate shaft portions inthe manner indicated in dotted lines in Fig. 1, in order to releasablyretain the top rolls on the arms 15 when the top rolls carrying arm C israised to an imperative position. A weighting means of purelyconventional construction may be provided for urging the top rolls 12downwardly toward the drawing plane with a predetermined force, such aweighting means not being shown in the drawings since this feature iswell known to those skilled in the art and has nothing to do with the,present invention. The top rolls 12 respectively cooperate with bottomrolls 16 which are turnably supported by members 17, respectively, thelatter being carried by the frame A in the manner illustrateddiagrammatically in Fig. 1.

The top rolls carrying arm C is composed of a pair of side. walls 18interconnected at their left end, as

viewed in Fig. 2, by an end wall, and attheir top edges by atop wall 32,so that the top rolls carrying arm C is essentially in the form of acontainer having an open bulged portion 20 which accommodates a sidewall of the support B, so that the side walls of the supportB arelocated in substantially the same planes as the side walls of catch 19,these side walls of the support B being spaced from each other by adistance slightly greater than the distance. between the side walls 18,as is shown most clearly in Figs. 3 and 4. As is apparent from Fig. 2,each of the side walls 18 is formed next; to its bottom edge with acut-out through which a hookportion of each of; the sidewalls of catchmember 19 freely extends into engagement with the projection 21 of eachside Wall of the. support B so that in this way the lateral hookportions of the movable catch member 19 cooperate. with; the projections21 of the support B to maintain the toplrolls carrying arm C in its.operative position shown l It will be noted from Fig. 2 that the topwall 32 of the Q s; prq d d h. a ib o u i ly m circular cross sectionwhich extends across the top wall 32, and the movable catch member 19has a channelshaped top wall provided with a downwardly directed concaveface of substantially semi-circular cross section into which the rib 22extends so that in this Way the catch member 19 is turnable on the topwall 32 of the arm C. The top wall 32 is formed just to the left of rib22, as viewed in Fig. 2, with an opening through which a tongue 23 ofthe catch member 19 freely extends, and this tongue 23 is itself formedwith an opening through which a leaf spring 24 passes, this leaf spring24 bearing against the under-surface of top wall 32 and urging the catchmember 19 in a counterclockwise direction as viewed in Fig. 2.

The side walls 18 are formed with a pair of aligned arcuate slots 26through which a pin 25 extends, this pin 25 extending across the spacebetween the side walls 18, through theslots 26 therein and being fixedto the side walls of the catch 19. The curvature of the slots 26 are ofa configuration, so that as catch member 19 turns the pin 25 moves alongthe slots 26;

A manually operative means is provided for moving the catch member 19out of; engagement with projections 21 of support B so as to release thearm C for; upward movement to an inoperatiye position and in theembodiment of Figs. 1-4 thismanually operable release means takes theform of an elongated resilient strip of metal 28 formed at its rightfree end, as viewed in Fig. 2, with the elongated slot throu which thepin 25 freely passes. The strip 28 is pivotally connected at its leftend, as viewed in Fig. 2, to a pin 29 which extends between and iscarried by a pair of lugs fixed to and extending. downwardly from thetop wall 32 between. the side walls 18.

At an intermediate part of the strip 28, which is pref erably located atthe forward half of the top. rolls carrying arm C; this strip 28 isshaped to form an upwardly extending projection 31, and this projection31 extends freely through an opening 33 formed at the top wall 32. Itwill be noted from Fig. 2 and Fig. 3 that the clearance betweenprojection 31 and wall 32 is fairly small, and that the wall 32 (and theside walls 18, as is evident from Fig. 3) serve to guide the projection31 for movement up and down in a direction substantially normal to thedrawing plane.

The above described structure is shown in Figs. l-3 in its operatingposition. If the operator wishes to rclease the arm C for upwardmovement to an inoperative position, he need only depress theprojection31, and this projection 31 may be. easily depressed with. one hand. Whenthe projection 31, which forms a pressure element accessible to theoperator, is depressed, the strip 28 bends and pulls the pin 25 totheleft as viewed in Fig. 2, so as to move the catch member 19 out of'engagement with the catch members 21. Then the arm C may be turned up toits inoperative position. As soon as the operator releases the pressureelement 31 the strip 28 snaps back to its unstressed position, shown inFig. 2. Furthermore, the spring 24 urges the catch member 19 back to aposition where it may again cooperate with the stationary catch members21. It will be noted that the. spring 24 acts independently of member 28to locate the movable catch member 19 in its operative position. Whenthe arm C is again turned down to its operative position, the hookportions of the side walls of' the catch member 19 simply ride over thestationary catch members 21 and the pin 25 moves along the slots 26 aswell as along the cut-out 27, the arm 28 being unstressed. As soon asthe arm C has been lowered sufiiciently, the spring 24 snaps the hookportions of the side wall of catch member 19 beneaththe stationary catchmembers 21 and the parts are again. in their operative position.

In the embodiment of the invention which is illus-. trated in Figs. 5,and 6, all of theunillustrated parts are identical with the partsdescribed above and shown in Fig. 1. The support B differs from thesupport B only in that the stationary catch members 21a, which areintegral with the support B, are located laterally inwardly from theremainder of the side walls of the support B by a simple bend in thecatch members 210, as indicated in Fig. 5. The pin 11 carried by thesupport B turnably carries the top rolls carrying arm D adjacent theright end of the latter, as indicated in Fig. 5. This top rolls carryingarm D is composed of a continuous side wall 34 having a pair of sidewall portions and an end wall portion located at the left end of arm D,as Viewed in Fig. 5, and a top wall portion 35 interconnecting the sideand end wall portions of the side wall 34, so that the arm D also formsa structure similar to a container having an open bottom. The top wall35 is formed adjacent the rear end of the arm B with an upwardly bulgingportion 36 having a downwardly directed concave face. A pin 37 extendsacross and is carried by the side wall portions of the side wall 34 andis located within the upwardly bulging portion 36 of the top wall 35.This pin 37 turnably supports a pair of movable catch members 38 whichare respectively provided with bottom catch portion 39 whichrespectively cooperate with the stationary catch members 21a of thesupport B, as is shown particularly in Fig. 6. Springs 41 respectivelypress against the catch members 38 to urge the latter in acounterclockwise direction about the pin 37, as viewed in Fig. 5, intocooperative engagement with the stationary catch members 21a, and thesesprings 40 abut at their left ends, as viewed in Fig. 5, against a pairof members 41, respectively, which are fixed to the arm D in anysuitable way, diagrammatically indicated in Fig. 5. For example, a barcarrying the members 41 may extend across and be fixed to the side wallportions of the side wall 34. A pin 42 extends between and is connectedto the pair of movable catch members 38 and a motion transmitting member43 formed at its right end, as viewed in Fig. 5, with an opening throughwhich the pin 42 freely passes, so that in this way the catch members 38are pivotally connected to the motion transmitting member 43. The leftend of member 43 is pivotally connected at 44 to a free end of a bellcrank 46 which is pivotally carried by the pin 45 extending between andfixed to the side wall portions of the side wall 34.

The top wall 35 of the arm D is formed adjacent its left end, as viewedin Fig. 5, with an opening passing therethrough and part of the materialof the top wall 35 extends downwardly to form a guide tube 47 whichdefines this opening in the top wall 35. A pressure element 48 which isaccessible to the operator extends slidably through the guide tube 47,and this pressure element 48 is itself tubular, is provided with a topwall, and is provided with a bottom outwardly extending annular flange49 which engages the bottom end of the tube 47 to limit upward movementof the pressure element '48. A spring 50 extends into the pressureelement 48 and bears against the top wall thereof, this spring 50 alsobearing against a free end 51 of the bell crank 46. The spring 50 isstronger than the springs 40 so that when the pressure element '48 isdepressed by the operator the bell crank 46 will turn in acounterclockwise direction about the pin 45, as viewed in Fig. 5, toshift the motion transmitting links 43 to the left, as viewed in Fig. 5,so as to move catch members 38 out of engagement with catch members 21awhile compressing the springs 40. The arm D may then be moved up to itsinoperative position, and the spring 40 returns the catch members 38 totheir operative position. Furthermore, it will be noted that thesesprings 40 return the release means 43-51 to its rest position indicatedin Fig. 5, the spring 50 being substantially unstressed in this restposition of the release means. When the arm D is returned to itsoperating position indicated in Fig. 5, the catch members 38 simply rideover the upper curved faces of the catch members 21a and snap betweenthe latter when the arm D has reached the position indicated in Fig. 5.

The embodiment of the invention which is illustrated in Fig. 7 issimilar to that of Fig. 5 in that it includes a pair of catch members38, pin 42, spring 40 and elements 41 identical with those of Fig. 5.However, with the embodiment of Fig. 7 the top wall 35 of the top rollscarrying arm B is formed with a simple opening through which a pressureelement 59 extends freely. The top wall 35' interconnects the side andend wall portions of side wall 34' of the arm B which is identical withthe side wall 34. The pressure element 59 is formed with a lower portion60 of reduced cross section which extends slidably through an opening ofguide 61 in the form of a bar extending between and fixed to the sidewall portions of the side wall 34. Thus, the guide bar 61 cooperateswith the portion 60 of pressure element 59 to guide the latter formovement up and down in a direction substantially normal to the drawingplane. This pressure element 59 extends through an opening 62 of a strip63 which is curved at its right end, as viewed in Fig. 7, to surroundthe pin 42, so that in this way the strip 63 is connected to the catchmembers 38. The strip 63, which may be made of metal, extends at itsleft end portion 64, as viewed in Fig. 7, slidably through an openingformed in a downwardly extending projection 65 of the top wall 35, sothat this projection 65 serves to guide the strip 63 for shiftingmovement forwardly and rearwardly. The pressure element 59 is providedwith an inclined face 59' which engages the left edge of opening 62, asviewed in Fig. 7, and therefore when this pressure element 59 isdepressed by the operator downwardly from the position indicated in Fig.7, (the strip 63 will be shifted to the left, as viewed in Fig. 7, inorder to turn the catch members 38 in a clockwise direction about thepivot pin; 37 so as to release the arm B for upward movement to aninoperative position. The inclination of the face 59" of.

the pressure element 59 is designed to permit this element 59 to beshifted upwardly to its rest position shown in Fig. 7 when the strip 63is urged to the right, as viewed in Fig. 7, by the actions of springs 40on the catch members 38 respectively. It is apparent that with theembodiment of Fig. 7 the operator need only depress element 59 torelease the arm B, and the latter may simply be turned downwardly to itsoperative position, the catch members 38 automatically moving intocooperative engagement with the catch members 21a as indicated in Fig.5.

The embodiment of the invention, which is illustrated in Figs; 8 and 9includes a top rolls carrying arm D identical with that of Fig. 5, aswell as a support B and stationary catch members 21a identical withthose of Fig. 5. Furthermore, elements 40 and 41, as well as elements47-50, of Fig. 8 are identical with the same elements of Fig. 5, so thatthe same reference characters indicate these identically constructedparts of Figs. 5 and 8. The springs '40 of Fig. 8 bear against a pair ofcatch members 52 which are pivotally carried by the pin 37 in the sameway as the catch members 38. The pair of catch members 52 are providedwith lower catch portions 53 respectively, which cooperate with thestationarycatch members 21a, respectively, in the manner indicated inFig. 8. The catch members 52 are each provided with a forwardlyextending projection 54 and these projections 54 are fixedly connectedto each other by a bar 54 extending between and fixed to the projections54.

An upwardly directed end 55 of a lever 56 engages the under surface ofthe bar 54. This. lever 56 is carried intermediate its ends by a pin 57which extends between and is fixed to the side wall portions of the sidewall 34. As is apparent from Fig. 8, the lever 56 is provided with acurved intermediate part which rests on the pin 57. The left free end 58of the lever 56 this way the bar 54' is moved upwardly so; as to turnthe catch members 52 against the-influence ofthesprings. 40 in aclockwise direction, about the pin, 37 out of en,- gagement with thestationary catch members 214. may be seen from Fig. 8, the clearancebetween wall 35 and lever 56, is sufficient to permit this lever to thecatch members 52 out of engagement with the catch members, 21a. However,the lever 56 will engage the top wall 35 before the end 55 of lever 56can; move out of engagement with the bar 54,. Thus, when the operatorreleases the Pressure element 48 the springs 40 will return the parts.to the position indicated in Fig. 8, and when the arm D of Fig. 8 islowered back to its operative position the parts 53 of the catch,member. 52 respectively ride over and snap. under the stationary catchmembers 21a, respectively, to again releasably maintain the armD initsoperative position.

In all of the, above described embodiments of the invention, the catchstructure is located at therear end portion of the top rolls carryingarm, while the manually operable pressure element is located adjacentthe forward end of this. arm, and the motion of the. pressure element istransmitted by a structure extending along the arm to the catchstructure located at the rear end portion. thereof. Furthermore, it willbe noted that, this structure which transmits the motion of the pressureelement to the catch structure-may take the form of a leverage whichenables theoperator to release the catch with only a fraction of theforce acting on the catch itself.

The supporting structure not illustrated in the embodiments of Figs. 1m9 is of conventional pivotal type.

The embodiments of the invention shown in Figs. -14, while they stillretain the manually operable pressure element at thev forward end of thetop rolls carrying arm, differ from the above described embodiments inthat all of the remaining structure of the invention also is locatedadjacent. to the forward end of the top rolls carrying arm.

Referring to Figs. 10-12, it will benoted that the frame. E differs fromthe frame-A in that it is provided with a forward endportion 66 havingupwardly directed notches in which the shaft of the front set of toprolls 67 is turnable. This front set of top rolls 67 cooperates with thefront top rolls 12 which are identical with the front top rolls 12 ofFig. 1. The remaining top rolls. 12 cooperate with the remaining bottomrolls 68 of the drawing mechanism, these bottomrolls being turnablysupported by blocks 69, respectively, which are carried by the frame E-in the manner indicated diagrammatically in Fig. 10. Furthermore, theframe E carries a guide bar 70 which guides a belt of the drawingmechanism, this belt being curved in a known way about the guide bar 70.A pair-of stationary catch members 71, both of which are-shown in Fig.11 and Fig. 12, engage the rear face of the guide bar 70 and extendupwardly therefrom. These catch members 71 are fixed to each other by aplate 71 which extends between and is fixed to the catch members 71'and'which is substatnially parallcl to the rear face of the guide bar70. IA screw 72 has its head in engagernent with the plate 71' andextends freely through an opening of this plate and an opening of theguide bar 70 into threaded engagement with the frame B so that the screw72 fixes elements 70 and 71 to each other and to the frame, E.

The top rolls carrying arm F of the embodiments of Figs. 10-12 includesa front, end wall 73 and atop wall.

74, as well as a pair of side walls in the same way as the abovedescribed embodiments. A pressure element 75 extends freely through anopening in the top wall 74,

which is defined by the downwardly directed tubular portion 76 of thetop wall 74, this pressure element 75 having at its bottom end anoutwardly extending annular flange 77 which engages the bottom end ofthe tubular portion 76 to limit the upward movement of the pressureelement 75. A spring 78 extends into a downwardly directed recessforming the pressure element 75 to urge the latter upwardly, and thisspring 78 also extends into a recess of an arm 79 of a, bell crank 80which is turnable about the pivot pin 81 extending between and fixed to.the side walls of the arm F. The other arm 82 of the bell crank 80 isdirected downwardly and engages the right end of a spring 83, as viewedin Fig. 10, this spring 83 extending into a recess of projection 84extending rearwardly from the inner face of the end wall 73 of the armF. The spring 83 is weaker than the spring 78v and in the position ofthe parts indicated in Fig. 10 the spring 78 is. substantiallyunstressed. A pair of catch members 85 are fixed. to. the arm 82 oflever 80 and formed integrally therewith, and these movable catchmembers 85 cooperate with the stationary catch members 71, respectively,in the manner indicated in Figs.

10-12, to releasably maintain the arm F in the operative positionindicatedin Fig. 10.

In order to release the arm F for movement upwardly to an inoperativeposition, the operator need only depress the pressure element 75 whichis guided for. movement in a direction substantially normal to thedrawing plane by thetubular portion 76. movement of the pressure element75 turns the bell crank 80 in a clockwise direction about the pin 81 soas to compress the spring 83, and move the movable catch members 85 outof engagement with the stationary catch members 71, respectively. Assoon as the operator releases the element 75, the catch structurecarried by the frame F returns to the position indicated in Fig. 10.When the arm F is turned back to its. operative position shown in Fig.10, the catch members 85 simply ride over the catch members, 71 and snapbeneath the same, respectively, so that the parts assume the positionindicated in Fig. 10.

The embodiment of the invention which is shown in Figs. 13 and 14includes a frame G which turnably supports a plurality of bottom rollsin the same way as the frame E. The forward end portion 86 of the frameG turnably supports the front bottom rolls 87 in the manner indicated inFig. 14. The bottom rolls to the rear ofgrolls 871 are supported by thefram G in the same way that the frame E supports the bottom rolls 68,andthe bottom rolls of the embodiment of Figs. 13 and 14 are identicalwith bottom rolls 68 and cooperate in the same way as the top rolls 12.The embodiment of Figs. 13 and 14. differs, however, in the manner inwhich it supports the front top rolls, the front top rolls 95 of thisembodiment being shown in Fig. 14.

The guide bar 88 of Figs. 13 and 14 corresponds in its construction andfunction to the guide bar 70. However, the guide bar 88extends throughan opening formed in a stationary catch-member 89 in the mannerindicated in Figs. 13 and- 14. A screw 90 extends through the stationarycatch member 89 and the guide bar 88 into threaded engagement with theframe G so as to fix guide bar. 88 andstationary. catch member 89 on theframe G. The top end" portion 91 of the catch member 90 has asubstantially T-shaped cross section, as is evident from Fig. 13, and iselongated andextends forwardly and rearwardly, as may be seen from Fig.14.

Thetop rolls carrying arm H in Figs. 13-14 is pro videdwithacontinuousside wall 93 having sidewall This downward,

portions and an end wall portion, the latter being shown on theyleftendof the arm H, as viewed in Fig. 14. Furthermore, the arm H includes atop wall 92 which forms, together with the continuous side wall 93, astruc* ture corresponding substantially to an open bottom container.

A tubular member 96 is fixed to an upwardly extending thread pin 97which passes through an opening of the top wall 92 and which is inengagement with a nut 98 which thus fixedly connects the tubular member96 to the arm H, adjacent to the front end thereof. A second tubularmember 99 is telescoped within the tubular member 96 and a pin 100 isfixed to and extends laterally from the tubular member 99 through anaxially extending slot 101 formed in the tube 96 so that tubes 96 and 99can not turn with respect to each other. The tube 99, however, can moveaxially with respect to the tube 96 within the limits of the slot 101. Aspring 102 is located within the space defined by the tubes 96 and 99and the ends of the spring 102, respectively, bear against the ends ofthe tubes 96 and 99 to urge the latter downwardly. A springy clip 103 isfixed to the bottom wall of the tube 99 by a rivet or the like, and thisspringy clip 103 is provided with downwardly extending springy tongueswhich engage the shaft 94 of the front set of top rolls 95 in the mannerindicated in Fig. 14 so as to position the top rolls 95 on the bottomrolls 87 and to hold the top rolls 95, when arm H is raised. When thearm H is raised to its inoperative position the pin 100 will engage thebottom end of slot 101 to prevent the bottom rolls 95 from beingseparated from the arm H.

A manually operative pressure element 104 is provided with an enlargedbottom end 105 located beneath the top wall 92 and having opposedinclined side faces shown in Fig. 13 for a purpose described below. Thewall 92 is formed with a downwardly extending tubular portion 106 whichdefines an opening through which the element 104 slidably extends sothat the tubular portion 106 guides element 104 for movement in adirection substantially normal to the drawing plane. The enlarged end105 of element 104 engages the bottom face of the tubular portion 106 tolimit upward movement of the element 104.

The opposed inclined lateral faces of the element 104 are locatedbetween and engage a pair of crossed levers 107 which are turnablycarried by pin 108 so that these levers form a structure similar to apair of scissors blades. The bottom ends of the levers 107 respectivelyform the stationary catch members 109 which extend beneath the top wallof the upper portion 91 of catch member 89, in the manner indicated inFig. 13, for maintaining the arm H in its operative position. The levers107 are urged toward each other by a spring 110 extending between andconnected to these levers in the manner indicated in Fig. 13. The pin108 is carried by and extends between a pair of crossbars 111 which arefired to and extend between the side wall portions of the side wall 93,and of course the levers 107 extend between the bearings 111.

In order to release the arm H for upward movement to an inoperativeposition, the operator need only depress the element 104 so as to spreadthe movable catch members 109 apart from each other by a distancegreater than the width of the top wall of the catch portion 91 ofT-shaped cross section. Then the arm H may be raised, and upon releaseof the element 104 the spring 110 returns the parts to the positionindicated in Fig. 13. When the arm H is returned to its operativeposition the catch members 109 ride over the lateral side edges of theside wall of the catch portion 91 and then snap beneath the side edgesto the position indicated in Fig. 13 so that the arm H is again retainedin its operative position.

It will be noted that with all of the above described embodiments of theinvention it is possible for the opera- 10 tor to release the top rollscarrying arm with one hand since the release operation requires onlydownward pressure on the pressure elements of the above describedembodiments. Furthermore, since this pressure element is located nearthe front end of the top rolls carrying arm, it is most easilyaccessible.

It will be understood that each of the elements described above, or twoor more together, may also find a useful application in other types ofdrawing mechanisms differing from the types described above.

While the invention has been illustrated and described as embodied in acatch structure for drawing mechanisms, it is not intended to be limitedto the details shown, since various modifications and structural changesmay be made without departing in any way from the spirit of the presentinvention.

Without further analysis, the foregoing will so fully reveal the gist ofthe present invention that others can, by applying current knowledge,readily adapt it for various applications without omitting featuresthat, from the standpoint of prior art, fairly constitute essentialcharacteristics of the generic or specific aspects of this inventionand, therefore, such adaptations should and are intended to becomprehended within the meaning and range of equivalence of thefollowing claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. In a drawing mechanism of a spinning machine, in combination, a toprolls carrying arm formed at a forward portion thereof which is locatedover the forward part of the drawing plane when said arm is in itsoperating position with an opening passing therethrough; support meanssupporting said arm for movement to and from an operating position; astationary catch member carried by said support means adjacent a rearportion of said arm; a movable catch member movably carried by said armadjacent said rear portion thereof for engagement with said stationarycatch member to maintain said arm in its operative position; anelongated motion transmitting member having a rear end portion pivotallyconnected to said movable catch member; a bell crank turnably carried bysaid arm and having opposite free end portions one of which is pivotallyconnected to said motion transmitting member; and manually operablepressure means extending through said opening of said arm and engagingthe other of said free ends of said bell crank, so that said pressuremeans may be pressed on by the operator to turn said bell crank and movesaid motion transmitting member to move said movable catch member out ofengagement with said stationary catch member.

2. In a drawing mechanism of a spinning machine, in combination, a toprolls carrying arm formed at a forward portion thereof which is locatedover the forward part of the drawing plane when said arm is in itsoperating position with an opening passing therethrough; support meanssupporting said arm for movement to and from an operating position; astationary catch member carried by said support means adjacent a rearportion of said arm; a movable catch member movably carried by said armadjacent said rear portion thereof for engagement with said stationarycatch member to maintain said arm in its operative position; anelongated motion transmitting member having a rear end portion pivotallyconnected to said movable catch member; a bell crank turnably carried bysaid arm and having opposite free end portions one of which is pivotallyconnected to said motion transmitting member; a spring engaging theother of said free ends of said bell crank and being substantiallyunstressed when said catch members engage each other; and a pressureelement engaging said spring and extending through said opening of saidarm to be accessible to the operator.

(References on following page) References Cited in the file of thispatent UNITED STATES PATENTS Orrell Jan. 17, 1939 Hohloch Apr. 20, 1954Balmes Solanas Sept. 7, 1954 Noguera Sept. 13, 1955 Balmes Solanas Apr.2, 1957 12 FQREIGN PATENTS Belgium Sept. 15, 1951 Great Britain Oct. 28,1953 Great Britain Mar. 24, 1954

